[GAMEPLAY]
IN GAME ITEM SHOP: After purchasing an item then using the "undo" feature (i.e. upgrade brown boots to mobility boots, then undo action), the green checkmark on the item still appears in the store, even though the item is not in the champion inventory (i.e. mobility boots with green checkmark, but brown boots in actual inventory). I have noticed this multiple times, with multiple items, and finally had the wherewithal to grab a screenshot.
It can be confusing to players who quickly glance and see the checkmark and assume they have the item already, when they do not. The check mark remains for the rest of the game, regardless if item is actually purchased or not.